초록 ▼

An improved sintered compact for use in a cutting tool is proposed which comprises 80 to 95 volume % of high pressure form boron nitride, a binder material which is a carbide, a nitride and/or a carbonitride of a IVb and Vb transition metal in the periodic table, and aluminum compounds. It may furth

An improved sintered compact for use in a cutting tool is proposed which comprises 80 to 95 volume % of high pressure form boron nitride, a binder material which is a carbide, a nitride and/or a carbonitride of a IVb and Vb transition metal in the periodic table, and aluminum compounds. It may further include copper and/or iron group metal or metals. The sintered compact obtained has high hardness even though the sintering pressure and temperature are relatively low.

대표청구항 ▼

A sintered compact for use in a tool consisting essentially of: 80 to 95 volume % of high pressure form boron nitride having an average particle size of less than 10 microns, the balance being a matrix comprising at least one binder material selected from the group consisting of a carbide, a nitride

A sintered compact for use in a tool consisting essentially of: 80 to 95 volume % of high pressure form boron nitride having an average particle size of less than 10 microns, the balance being a matrix comprising at least one binder material selected from the group consisting of a carbide, a nitride, and a carbonitride of a IVb and Vb transition metal in the Periodic Table, mixtures thereof and their solid solution compounds; and aluminum compounds, wherein the content of aluminum in said matrix is 5 to 30 weight %, and wherein the particles in said matrix are of a size of less than one micron.